[2.0??][CLOSED] Dropdown list in Page Grid

[2.0??][CLOSED] Dropdown list in Page Grid

I'm having problems with the dropdown list in the page grid. I could not select the dropdown list but i could render it into the column. Do your have any idea what is it about or how could i go around maybe but change it into Ext's Combobox.

I've solve the problem which is not really a problem actually. Just that the RowSelectionModel cannot be set as {selectRow:Ext.emptyFn}. Now the dropdown list is selectable. However, I would like to change to ComboBox for ext. Anybody got any idea how to set ComboBox in the renderer function as it require a div if i'm not wrong?